If you just want I nice, low-ish volt OC, I would go with 8x400 = 3.2Ghz. Over that and the volts need to go up quite a bit.

I tried that, but for some reason it's not stable. I even had the memory at a 1:1 ratio. I think, and this is pure speculation, that it has something to do with my Northbridge temp (no fan, just a heatsink) or my PSU. I don't know why I think that, just a hunch. Well, until I can get a fan on that NB and/or a new PSU it looks like 3.0GHz (333x9) is going to have to do, plus my memory is running at it's actual speed of 1066 this way, too. Thanks for your input, Revs.

Yeah, for some reason I haven't had much luck with 3.2GHz, but I may toy with it some more. I'm 100% stable at 3.0GHz, but for some reason CPUz is showing my voltage at 1.312, which is weird, because in the BIOS I have it set at 1.35v. I better have a look, again...

That is probably due to what people call vdroop.

The cpu voltage drops under load. I think its some sort of thermal or safety feature. It can be annoying while overclocking but its probably why our CPUs can take 1Ghz + overclocks 24\7 for years without failing.

Basically, you'll have to bump the voltage up more to compensate, and its up to you if you think its worth it. You'll get more heat (since the voltage will be higher at idle too), but you'll also get more overclocking head room. Since you're using a tuniq tower, you can probably go for it. Just watch your temps and use coretemp to monitor during testing. Most other programs don't report the correct temps.

I have my voltage set to 1.5v, which is pretty damned high, and under full load my CPU drops to around 1.44v. Thanks to the big ass cooler I'm using, the system has been rock solid for almost a year now. These chips are amazing.

Teh Capt's right SLippe, more vCore needed. My old Striker seemed to need alot of volts, I had it at 1.5v @ 3.36Ghz.

400Mhz FSB is a good OC cos like you said, you can run your memory at a 1:1 ratio. I would try again with higher vCore, 1.45v ish, if it's stable at that clock, drop the vCore to find the minimum vCore for that speed.

Have you disabled the 'spread spectrum' options, that usually helps. The P35 chipset can generally get well over 450Mhz.

The cpu voltage drops under load. I think its some sort of thermal or safety feature. It can be annoying while overclocking but its probably why our CPUs can take 1Ghz + overclocks 24\7 for years without failing.

Basically, you'll have to bump the voltage up more to compensate, and its up to you if you think its worth it. You'll get more heat (since the voltage will be higher at idle too), but you'll also get more overclocking head room. Since you're using a tuniq tower, you can probably go for it. Just watch your temps and use coretemp to monitor during testing. Most other programs don't report the correct temps.

I have my voltage set to 1.5v, which is pretty damned high, and under full load my CPU drops to around 1.44v. Thanks to the big ass cooler I'm using, the system has been rock solid for almost a year now. These chips are amazing.

Quote:

Originally Posted by Revs

Teh Capt's right SLippe, more vCore needed. My old Striker seemed to need alot of volts, I had it at 1.5v @ 3.36Ghz.

400Mhz FSB is a good OC cos like you said, you can run your memory at a 1:1 ratio. I would try again with higher vCore, 1.45v ish, if it's stable at that clock, drop the vCore to find the minimum vCore for that speed.

Have you disabled the 'spread spectrum' options, that usually helps. The P35 chipset can generally get well over 450Mhz.

Thanks, fellas. I'll mess with it more this weekend. I start my "vacation" on Sunday, so I'll have like 10 days off to mess with it. My temps have been really good, so far, so I don't think 1.45v or whatever will be too bad. I'll report back in a few days. Thanks, again.

That's what I have it set at in the BIOS, but for some reason all monitoring software never shows it at that setting and it even drops below what is in that screenshot sometimes. Probably could get away with 1.45v. *shrugs* Temps are good either way.

That's what I have it set at in the BIOS, but for some reason all monitoring software never shows it at that setting and it even drops below what is in that screenshot sometimes. Probably could get away with 1.45v. *shrugs* Temps are good either way.

Yeah, I think that's the "vdroop" people refer to. I think I run mine at 1.4 for 3.2GHz

I just upped my vcore to 1.5v in BIOS, CPUz shows 1.45v. Bus is now @ 425 which puts me @ 3.4GHz with rated FSB @ 1700MHz while using a 2.5:1 (or whatever) ratio to put my RAM at 1063, just below normal speed of 1066.